According to studies, 1% of all patients who undergo laser surgery to correct their vision have serious post laser vision problems. In a random sample of 95,000 patients, let x be the number who experience serious post-laser vision problems a. Find E(X). b. Find Var(x). c. Find the z-score for x = 960. d. Find the approximate probability that fewer than 960 patients in a sample of 95,000 will experience serious post-laser vision problems. a. Ex) = [950 (Type a whole number.) b. Var(x) = [941] (Round to the nearest whole number as needed.) c. The z-score is O. (Round to two decimal places as needed.) d. The probability isO (Round to four decimal places as needed.)

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According to studies, 1% of all patients who undergo laser surgery to correct their vision have serious post laser vision problems. In a random sample of 95,000 patients, let x be the number who experience serious post-laser vision problems
a. Find E(x).
b. Find Var(x).
c. Find the z-score for x = 960.
d. Find the approximate probability that fewer than 960 patients in a sample of 95,000 will experience serious post-laser vision problems.
a. E(x) = 950
(Type a whole number.)
b. Var(x) = 941
(Round to the nearest whole number as needed.)
c. The z-score is.
(Round to two decimal places as needed.)
d. The probability is
(Round to four decimal places as needed.)
Transcribed Image Text:According to studies, 1% of all patients who undergo laser surgery to correct their vision have serious post laser vision problems. In a random sample of 95,000 patients, let x be the number who experience serious post-laser vision problems a. Find E(x). b. Find Var(x). c. Find the z-score for x = 960. d. Find the approximate probability that fewer than 960 patients in a sample of 95,000 will experience serious post-laser vision problems. a. E(x) = 950 (Type a whole number.) b. Var(x) = 941 (Round to the nearest whole number as needed.) c. The z-score is. (Round to two decimal places as needed.) d. The probability is (Round to four decimal places as needed.)
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